Re: continuous backup solution for FreeBSD

On Fri, Oct 10, 2008 at 03:53:38PM +0300, Evren Yurtesen wrote:
Mike Meyer wrote:
On Fri, 10 Oct 2008 02:34:28 +0300
yurtesen@xxxxxxxxx wrote:

Quoting "Oliver Fromme" <olli@xxxxxxxxxxxxxxxxx>:

These features are readily available right now on FreeBSD.
You don't have to code anything.
Well with 2 downsides,

Once you actually try and implement these solutions, you'll see that
your "downsides" are largely figments of your imagination.

So if it is my imagination, how can I actually convert UFS to ZFS
easily? Everybody seems to say that this is easy and that is easy.

It's not that easy. I really don't know why people are telling you it
is. Converting some filesystems are easier than others; /home (if you
create one) for example is generally easy:

1) ZFS fs is called foo/home, mounted as /mnt
2) fstat, ensure nothing is using /home -- if something is, shut it
down or kill it
3) rsync or cpdup /home files to /mnt
4) umount /home
5) zfs set mountpoint=/home foo/home
6) Restart said processes or daemons

"See! It's like I said! EASY!" You can do this with /var as well.

Now try /usr. Hope you've got /rescue available, because once /usr/lib
and /usr/libexec disappear, you're in trouble. Good luck doing this in
multi-user, too.

And finally, the root fs. Whoever says "this is easy" is kidding
themselves; it's a pain. You get to make a new filesystem called /boot,
and have all sorts of fun. It's really not a snap-fingers-voila thing,
and I will gladly argue with anyone who thinks otherwise. Is it do-able
though? Yes.

--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |

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